Valve



(No Model.)

J.;M. GOLDSMITH.

VALVE.

Patented May 6,1884.

5o pressed :into a conical seat attached'to a hubk have provided themain valve-segment with UNITED STATES PATENT EEICE.

J. MORTIMEB GOLDSMITH, OF IBOSTON, MASSACHUSETTS.

- VALVE.

SPECIFICATION forming part of Letters Patent No. 297,986, dated May 6,1884.

Application sied July 24, 1883. (Nummer) To all whom it may concern:

y Be it known that I, J. IMOETIMER GOLD- SMITH, of Boston, county ofSuffolk, State of Massachusetts, have invented an Improve ment inValves, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

My invention relates to that class of` valves known as straight-wayvalves, commonly employed for steam, water, and oil, and has foritsobject to improve their durability and cheapen their construction,and enable them to be self-packing, and to be operated quicker and moreeasily, the valve being so constructed that by one movement of a leverit may be opened gradually from its nest iioW to a full pipe area, andbe closed instantly whenever required, which cannot be done withascrewoperated valve. In this my improved valve the valve-segmentcovering the seat of the valve-outlet never leaves its seat, and whennot subjected to Huid-pressure is held against its seat by` a suitablespring, so that it is impossible for sediment or foreign matter to lodgebetween the seat and valve-segment and cut or Wear the same. In myvalve, Vwhen closed, the greater the pressure the closer the contactbetween the valve-segment and its seat, and consequently the tighter thevalve. To facilitate and render easy the movement of a largevalve-segment, the frictional resistance of which is in proportion tothe pressure, I

an auxiliary valve-segment adapted to cover and uncover one or moresmall ports made in the main valve-segment, to thus more nearly equalizethe pressure at eachside the main valve-segment before it is moved touncover thevalve-outlet. Thevalve-segmentis moved on its seat by a headhaving a guided stem, and provided with a transverse central Way andwith suitable projections to engage the said segment. The projectionsfor moving the valve-segment are so placed with relation to the way inthe said head as to leave the way unobstructed when the valve-segment isin position to uncover the outlet. Thehead re- I ferred to has a conicalshoulder, which is My invention also consists in 'a valveshell i havingva cylindrical seat, and a loose valvesegment adapted to be pressedagainst the said seat by the pressure of the iiuid in the saidvalve-shell, combined with a head having a stem and a way, and withprojections located in such position with relation to the said way andthe valve-outlet that the said head, when turned to move thevalve-segment to uncover the valve-outlet, shall place the way in thehead in line with the valve-outlet.

Figure l represents in `vertical section a valve embodyingA my presentimprovements; Fig. 2, a horizontal section of the entire valve in thedotted line x x, Fig. l; Fig. 3, a similar section on the dotted line xw; Fig. 4, a back view of the main valve-segment, and Fig. 5 a like viewof the auxiliary valve- Segment. Y

Inthe drawings, A represents the valve shell or case, A its'inlet, andA2 its outlet,end. The shell or case is bored out cylindrically to forma valve-seat, b, against which slides the convex-turned face of the mainvalve-segment c, the said segment being placed in the valvecase loosely,so that the pressure of the iiuid to be controlled by the valve measuresthe pressure ofthe said main valve-segment against its "seat b,when theoutlet of the valve is closed by thevsegment, the greater theHuid-pressure the closer the fit. In a largevalve this pressvure is sogreat as to make it quite difficult to move the main valve segment; sofor such valves I provide the main valve-segment with one or more ports,2, and turn its back for the reception against it of the turned face ofa smaller 'auxiliary valve-segment, which has suitable shoulders orprojections, .3, at its rear IOC side,which are adapted to be engaged byproj ections d d of the rotating head or valve-mover B. Thisvalve-1nover B is provided with a way or passage, B', for the fluid, andhas a stem, B2, extended outward through the cap or cover C, where ithas applied to it a handlever, B, by which to turn the said head andslide the valve-segment on its seat to uncover or cover the outlet ofthe valve. As shown in Fig. 2,where the outletis uncovered, movement ofthe head B in the direction of' the arrow 16 near it will cause theprojections d in engagement with the projections 3 on the auxiliaryvalve-segment to slide the latter 011 its seat (the back of the mainvalve-segment) until the end of the valve-segment c" strikes the pin orprojection 5 of the main valvesegment, and thereafter the mainvalve-segment c will be moved in unison with it until the stop pin orprojection 6, carried by the foot 7 of the head B, (which foot is fittedinto a socket, 8,0f the ease,) meets the shoulder 9, formed at one endof a recess, 10, made in the annular support 12,on which the end of themain valvesegment rests and moves, when the further movement of the headand valve will be arrested. As the auxiliary valve -segment is movedfrom its position, Fig. 2, against the stop 5, it closes the port 2 ofthe main valvesegment. Vhile the valve-segments `are in the position,Fig. 2, a suitable spring, e, between the back of the segment c2 and theside of the head, and with its ends abutted against the projections orshoulders 3 at the back of segment 0*, keeps the face of thevalve-segment c in contact with the seat b,and also keeps the twovalve-segments pressed together, so that the valve-segment c does notretire or draw back from its seat,as is the case with a valvediskoperated by a screw, and consequently there is no opportunity for theentrance of grit, dirt, or foreign matter between the main valve-segmentand the seat b to wear them. The edges of the sliding valve-segmentsactto clean the seats on which they rest. lVhen the main valve segment actsto close the main outlet of the valve-case, its port 2 is closed by theauxiliary valve-segment c2, and the main valve-segment is thrust againstthe seat b by a force measured by the pressure of the fluid on the backof the said valve-segment.

To start the main valve-segment and uncover the outlet of the case A,the hub B is turned in a direction opposite the arrow 16, Fig. 2, tomove the auxiliary valve-segment far enough to place the port 17 thereofin line with the port 2 of the main valve-segment, which thus permitsthe fiuid to pass beyond the said main valve-segment and relieves itfrom its great pressure on the seat b, and in its further movement theend of the said auxiliary valve-segment strikes the pin or projection 1Sof the main valve-segment, and slides it around on the seat b to uncoverthe outlet A2, and, as the edge ofthe said main valve-segment uncoversthe said outlet, the way B, made transversely through the head B, comesgraduallyinto line with the inlet and outlet ends of the case, making asubstantially straight way.

rIhus far I have described a valve having a main and an auxiliarysegment, it being such as I prefer to use in valves ot' any considerablesize, or employed for very high pressures; but it will be understoodthat the auxiliary valvesegment may be omitted, and to do so and producea valve with but the segment c it is only necessary to prolong theprojection d, so as to strike the projections 5 and 18, or otherwisesuitably engage the said valve-segment, its port 2 being of courseclosed, and with but this one valve-segment the ends ofthe spring c, ofsuitable length, will abut against the projections 5 and 18, and will bethereby rigidly held.

The foot 7 of the head B is shown as chambcred to receive a spring,f,which rests at one end against the case A, and acts to press the conicalpart 2O of the head into the conical seat made in the hub 2l, preferablycast with the cap C, the said conical seat and conical part 20 havingsuitable passages and grooves, 22 23, for the reception of the materialcontrolled by the valve, which, entering therein, serves as a lubricant,or to avoid setting ofthe parts, such construction enabling thevalvestem about the case to be made close without the employment of theusual stuffing-box and packing.

To increase the closeness of fit between the part 20 and its conicalseat, I have provided the stem B2 with a screw-thread at 24, upon which,after applying the spring 25, I have screwed a nut, f', by turning whichthe effective force of' the said spring may be increased or diminished.

Between the upper end of the shell A and cap C, I insert a piece ofsuitable packing, g, it being placed in an annular groove formed,preferably, in the plate C.

It will be noticed that the projections which move the segment orsegments are so placed on the side ofthe head or valve-mover B that whenthe valve-segment c uncovers the outlet of the valve-case the way B isbrought into and remains in line with the inlet and outlet of the caseA.

I have thus far described the main valvesegment as held against theoutlet-passage of' the seat b to check the fiow of fluid through thevalveshell, and while I greatly prefer such construction it will beunderstood, should the spring e be made sufficiently stiff to overcomethe pressure of the fluid, then in such case the valve-segment may beemployed to cut off the iuid at the part of the seat b next or about theinlet of the case, the recess 10 and stoppin 6 being suitably located topermit such change; and it will also be understood that I may, ifdesired, without departing from my invention,employ two or threevalve-segments like that marked c, or two or three sets of se U'- mentslike those marked c and c2. b'

IOO

IIO

By the use of two segments opposite each other I may simultaneously openand close both an' outlet and an inlet, and by the use of threeindependent segments I may adapt my invention for use as a three-wayvalve.

I claiml 1. In a straight-way valve, a case or shell having acylindrical seat, b, a valve-segment placed'therein loosely, aheadforvalve-mover also in said shell, having a stem and a trans verse iiuidwayor port, a spring interposed bef tween, said Valve-segment andvalve-mover,

and projections on the two to engage such segment and its mover, allcombined and arranged substantially as described. 4

2. The valve-case having the cylindrical seat b, a main valve-segmentprovided with aport, and an auxiliary valve-segment seated on the saidmain valve-segment, combined with the head or valve-mover provided withthe transverse way B, and with means to move the said valve-segments insuccession, as and for the purposes described.

3. The valve-case and valvesegment inserted therein loosely, and theheadV or valvemover provided with a suitable way for the passage of theiiuid, combined with a spring to keep the valve-segment againstthevalve-seat b, substantially as described.

4. The valve-case provided with the cylindrical seat b and recess 10,and valve-segment y part 20 into the conical seat inthe said extendedhub, substantially as described.

6. The valve-case and its cap provided with the hub 21, extended intothe said shell, and 45 having passages 22, combined with the head B,provided with the conical part 20, having grooves, and with a nut toregulate the force of the said spring, substantially as described.

7. The valve-segment provided at its rear 5o side with projections orshoulders, combined with a Hat spring, e, having its ends abuttedagainst the said shoulders, substantially as described.

In testimony whereof I have signed my name 55 s J. MOR'IIMER GOLDSMITH.

Witnesses:

G. W. GREGORY, B. J. NoYEs.

